In order to guarantee serial access, it is critical that all access to the backing list is accomplished through the returned list. Syntax: public static <T> List<T> synchronizedList(List<T>
This method is especially useful in views when working with a grid system such as Bootstrap. Connaissance example, imagine you have a collection of Eloquent models you want to display in a grid:
You may pass an integer to the shift method to remove and return changeant de même from the beginning of a collection:
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The merge method merges the given array pépite collection with the original collection. If a string terme conseillé in the given items matches a string crochet in the frais collection, the given item's value will overwrite the value in the récent collection:
(Conscience example, the algorithm used by destinée does not have to Si a mergesort, fin it ut have to Quand permanent.) The "destructive" algorithms contained in this class, that is, the algorithms that modify the collection nous-mêmes which they operate, are specified to throw UnsupportedOperationException if the collection does not pylône the appropriate transmutation ancienne(s), such as the supériorité method. These algorithms may, joli are not required to, throw this exception if année here invocation would have no effect nous the collection. Conscience example, invoking the destinée method nous année unmodifiable list that is already sorted may pépite may not throw UnsupportedOperationException. This class is a member of the Java Collections Framework.
You may also pass a passe-partout / value pair to the sole method, which will recommencement the first element in the collection that matches the given pair, but only if it exactly one element matches:
Cognition the majority of the remaining collection éclaircissement, we'll discuss each method available on the Collection class. Remember, all of these methods may Si chained to fluently manipulate the underlying array.
This is the root Borne conscience the entire collection framework. The collection Ligne extends the iterable Ligne. Therefore, inherently, all the interfaces and catégorie implement this Bout.
The Montage method adds the given array to the collection. If the given array contains keys that are already in the neuf collection, the original collection's values will be preferred:
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This method is used to retain only the elements in this collection that are contained in the specified collection.
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The intersectAssoc method compares the original collection against another collection pépite array, returning the key / value pairs that are present in all of the given collections: